Drinking tap water also wipes away lingering sugars and acids from your teeth. It's a great way to lessen the effects from food or sodas when you can't brush. And since tap water has fluoride added to it, it's actually better for your teeth than bottled water [source: Mayo Clinic].

When these tricks don't desensitize your teeth, though, it's time to see the dentist.

Brush Up

Brush and floss at least twice daily for two to three minutes to keep teeth free of acids and sugars. Tough, frayed bristles brush poorly, so replace your toothbrush every three to four months [source: Mayo Clinic].